P: Time-consuming and much longer than a standard police interview

E: For example, police officers need specialised training to be able to deliver an effective cognitive interview, as they also need to be able to develop a rapport with the person they're interviewing and build enough trust for them to relax and open up about potentially serious crimes, that may be difficult to talk about

E: This training can be expensive and time-consuming, therefore perhaps the cognitive interview isn't the most practical, cost-effective option for police forces

P: There is supporting evidence

E: For instance, Fisher et al found that witnesses reported greater detail in their accounts of crimes, when detectives used the cognitive interview, compared to the standard interview.

E: This may be because the technique is more structured and therefore may be more appropriate for crime-related interviews as it is thorough, enabling detectives to gather the level of detail required,

E: This supports the idea that the cognitive interview is more useful than the standard interview, making it a beneficial method to use